Crucible.



Mnrrnn PORTER W. SHIMER, OF EASTON, PENNSYLVANIA.

CRUCIBLE SPECIFICATION forming part of Letters Patent No. 669,862, datedMarch 12, 1901.

Application iiled'September 22, 1900. Serial No. 30,754. (No model.)

T0 @ZZ whom it may concern.-

Be it known that I, PORTER W. SHIMER, a Citizen of the United States,and a resident of Easton, in the county of Northampton and State ofPennsylvania, have invented a new and Improved Crucible, of which thefollowing is a full, clear, and exact description.

The invention relates to combustion-crucibles such as shown anddescribed in the Letters Patent of the United States No. 653,823,granted to me on Julyl', 1900, and mainly used for fusing or highlyheating metal or other substance in an atmosphere of any gas desired,the crucible being provided with a hollow stopper seated on a rubbergasket and having means for Cooling the stopper and Crucible andcirculating air or other gas through the latter.

The object of the invention is to provide a new and improved Cruciblehaving means for more effectually cooling the upper end of the stopperto prevent the rubber gasket from being burned or otherwise injuredwhile the crucible is used.

The invention consists of novel features and parts and combinations ofthe same, as will be fully described hereinafter and then pointed out inthe Claims.

Figure l is a perspective View of the improvement. Fig. 2 is a sectionalside elevavation of the same. Fig. 3 is a sectional plan view of thesame on the line 3 3 in Fig. 2, and Fig. 4 is a perspective View of aseparable cooling-chamber for the Crucible.

The Crucible A, constructed of platinum or other suitable metal, isadapted to receive at its upper end a gasket B, of rubber or othersuitable material, and on this gasket is adapted to be seated a hollowstopper O, having airinlet and air-outlet pipes D D' for establishing acirculation of air in the crucible when the latter is used in the usualmanner. The hollow stopper O is further provided with a water-inlet pipeE and a water-outlet pipe E', of which the former is connected with asuitable cooling medium supply, such as water, to circulate the water inthe said stopper, the overflow of the water passing through theoutletpipe E and a flexible connection F to a pipe G,

leading to aCooling-chamber H, arranged eX- ternally on the upper end ofthe crucible Aand either constructed integrally therewith, asillustrated in Fig. 2, or in the form of a separable hollow ring H', asillustrated in Fig. 4. The chamber H is provided with an outletpipe I,located diametrically opposite the iulet-pipe G.

By the arrangement described the gasket B is located between the hollowcooling-stopper O and the hollow chamber H, so that when the Crucible isused the said gasket is protected from injury by the heat incident tothe use of the Crucible7 it being understood that the same coolingmedium that is used for the y stopper is used in the chamber H, andconsequently the construction of the crucible is simplified as much aspossible.

Having thus fully described my invention, I Claim as new and desire tosecureby Letters Patentl. A Crucible having an internal gasket, anexternal coolingchamber arranged approximately opposite the Cruciblegasket, and means for circulating a c ooliug medium through saidchamber, as set forth.

2. A Crucible having a cooling-chamber at its open end, a hollowstopper, and means for establishing communication between the interiorof said stopper and `said chamber, to circulate a cooling medium throughthe same, as set forth.

3. A Crucible having a cooling-chamber at its open end, a removablehollow stopper, and means for circulating a cooling medium through saidstopper and from the latter through said chamber, as set forth.

4. A Crucible having a hollow stopper, a cooling-chamber on saidCrucible at its open end, agasket interposed between said hollow stopperand said chamber, and means for circulating a Cooling medium throughsaid stopper and said chamber, as set forth.

5. A Crucible having a hollow stopper, a cooling-chamber on saidCrucible at its open end, a gasket interposed between said hollowstopperand said chamber, means for connecting said stopper with saidchamber, means for circulating a cooling medium through said Intestimony whereof I have signed my name to this specification in Ihepresence 0f nwo subscribing Witnesses.

stopper, the overow of the cooling medium passing by said connectingmeans into said chamber, and an outlet for the cooling medium from saidchamber, as seb forth. l PORTER W. SHIMER.

6. A erueble having a cooling-chamber at its open end, a hollow stopper,and a gasket between the stopper and the cooling-chamber.

Witnesses:

JOHN BRUNNER, CHAs. B. BRUNNER.

